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Journal articles on the topic 'Maximum degree of stability'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Kim, D. P. "Synthesis of systems with maximum robust degree of stability." Journal of Computer and Systems Sciences International 46, no. 5 (2007): 721–25. http://dx.doi.org/10.1134/s106423070705005x.

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2

Ali, Jiwan Jalal, and Didar Abdulkhaleq Ali. "Stability and Maximum Independent Bond Set Polynomials of Painkiller Molecules Using Maximum Matching." European Journal of Pure and Applied Mathematics 18, no. 2 (2025): 5992. https://doi.org/10.29020/nybg.ejpam.v18i2.5992.

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Chemical graph theory establishes a connection between the properties of molecules and their corresponding molecular graphs. A topological index is a graph invariant that characterizes the graph's structure and remains unaffected by graph automorphisms. In chemical graph theory, degree-based topological indices are particularly significant, offering crucial insights into the structural features of molecules. In this work, we introduce the maximum independent bond set polynomial $MIBSP(H;x,y)$, a powerful tool for deriving various degree-based topological indices. We specifically apply $MIBSP(H

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Ezangina, Tatiana Al, and Sergey An Gayvoronskiy. "Ensuring Maximum Stability Degree in the Systems with Interval Parameters." Applied Mechanics and Materials 752-753 (April 2015): 955–60. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.955.

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The robust control system objects with interval-undermined parameters is considers in this paper. Initial information about the system is its characteristic polynomial with interval coefficients. On the basis of coefficient estimations of quality indices and criterion of the maximum stability degree, the methods of synthesis of a robust regulator parametric is developed.

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4

Tsirlin, Anatoliy M., and Alexander I. Balunov. "Optimal Control of Technological Processes." Processes 11, no. 6 (2023): 1835. http://dx.doi.org/10.3390/pr11061835.

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The paper formulates conditions under which the roots closest to the imaginary axis (critical roots) of the characteristic equation of a linearized system are real for the maximum possible degree of stability of the closed-loop control system of a technological process with pure delay. For the parameters of the controllers corresponding to the maximum degree of stability, these roots are multiples. Their multiplicity order is one more than the number of coefficients in the transfer function of the controller. It is demonstrated that for a typical technological control object, these conditions

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Gayvoronskiy, S. A., Tatiana Al Ezangina, and A. V. Sobol. "Control Systems Synthesis of Maximum Robust Stability Degree Based on Vertex Critical Root Diagrams." Mekhatronika, Avtomatizatsiya, Upravlenie 24, no. 10 (2023): 519–25. http://dx.doi.org/10.17587/mau.24.519-525.

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The article solves the problem of operative selection of the redundant onboard equipment complex components configuration of the suitable in the current operating conditionаs in the interests of ensuring high fault tolerance of the complex, as well as achieving other operational and technical characteristics. The basis of the redundancy management system of the complex consists of configuration supervisors — as program subjects according to the number of its competitive configurations of heterogeneous and nonuniform equipment worked out in advance. The choice of the preferred configuration is

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Alibekov, A. K., and G. A. Аlibekov. "MODELS FOR DETERMINING MAXIMUM DEGREE FILLING CHANNELS OF CIRCULAR SECTION SHAPE." Herald of Dagestan State Technical University. Technical Sciences 46, no. 2 (2019): 28–36. http://dx.doi.org/10.21822/2073-6185-2019-46-2-28-36.

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Objectives The task was to obtain a model for determining the maximum possible degree of filling the circular section channels in the earthen channel based on the condition of ensuring the stability of slopes and the minimum volume of excavation during their construction, as well as finding the optimum degree of filling fortified channels of a closed profile corresponding to maximum throughput.Method In work analytical methods of differential calculus and the solution of implicit equations are used.Result The experience of domestic and foreign researchers was taken into account to solve the se

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7

Cojuhari, Irina. "ALGORITHM FOR SELF-TUNING THE PID CONTROLLER." Journal of Engineering Science XXVIII, no. 4 (2021): 63–73. http://dx.doi.org/10.52326/jes.utm.2021.28(4).06.

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An algorithm for self-tuning the PID controller to the second order systems is proposed in this paper. The proposed self-tuning procedure was developed according to the maximum stability degree criterion, the criterion that permits to achieve the high stability degree, good performance and robustness of the system. According to the proposed algorithm, the controller can be tuned according to the parameters that characterize the process and they can be determinate from the experimental response of the open loop system. To demonstrate the efficiency of proposed procedure of self-tuning the PID c

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8

Sri Namachchivaya, N., H. J. Van Roessel, and S. Talwar. "Maximal Lyapunov Exponent and Almost-Sure Stability for Coupled Two-Degree-of-Freedom Stochastic Systems." Journal of Applied Mechanics 61, no. 2 (1994): 446–52. http://dx.doi.org/10.1115/1.2901465.

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In this paper, a perturbation approach is used to calculate the asymptotic growth rate of stochastically coupled two-degree-of-freedom systems. The noise is assumed to be white and of small intensity in order to calculate the explicit asymptotic formulas for the maximum Lyapunov exponent, The Lyapunov exponents and rotation number for each degree-of-freedom are obtained in the Appendix. The almost-sure stability or instability of the four-dimensional stochastic system depends on the sign of the maximum Lyapunov exponent. The results presented here match those presented by the first author and

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9

Danchick, Roy, and Mario L. Juncosa. "Maximum polynomial degree Nordsieck–Gear (k,p) methods: Existence, stability, consistency, refinement, convergence and computational examples." Applied Mathematics and Computation 182, no. 1 (2006): 907–33. http://dx.doi.org/10.1016/j.amc.2006.04.067.

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10

Zhu, Shaopeng, Bangxuan Wei, Chen Ping, et al. "Research on Stability Control Algorithm of Distributed Drive Bus under High-Speed Conditions." World Electric Vehicle Journal 14, no. 12 (2023): 343. http://dx.doi.org/10.3390/wevj14120343.

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Aiming at the instability problem of a four-wheel independent drive electric bus under high-speed conditions, this paper first designs a vehicle yaw stability controller based on a linear two-degree-of-freedom model and a linear quadratic programming (LQR) algorithm. A vehicle roll stability controller is then designed based on a linear three-degree-of-freedom model and a model predictive control algorithm (MPC). Moreover, a coordinated control rule based on the lateral load transfer rate (LTR) is designed for the coupled problem of yaw and roll dynamics. Finally, the effectiveness of the prop

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11

Hamoudi, Ahmed Khalaf, and Suha S. Husain. "Design of Adaptive Synergetic Controller for One Degree of Freedom Robotic ARM Under External Disturbance." Journal of Robotics and Control (JRC) 6, no. 1 (2025): 406–12. https://doi.org/10.18196/jrc.v6i1.25207.

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In order to manage a one-link robot arm, this research proposes a unique control architecture based on the Synergetic Control (SC) principle. The synergetic control design is initially developed using known system parameters and subjected to external disturbances. However, in practical robotic systems, uncertainties are inherent in the system parameters. As a result, an algorithm known as Adaptive Synergetic Control (ASC) is presented and developed for a robot arm that encounters parameters uncertainty. To estimate disturbances and guarantee the asymptotic stability of the monitored system, ad

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12

Jin, Junyu, Xufeng Jin, Yu Wang, and Fang Qiao. "Study on Stability and Fluidity of HPMC-Modified Gangue Slurry with Industrial Validation." Materials 18, no. 15 (2025): 3461. https://doi.org/10.3390/ma18153461.

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HPMC, regulating slurry properties, is widely used in cement-based materials. Research on the application of HPMC in gangue slurry is still in its early stages. Moreover, the interactive effects of various factors on gangue slurry performance have not been thoroughly investigated. The work examined the effects of slurry concentration (X1), maximum gangue particle size (X2), and HPMC dosage (X3) on slurry performance using response surface methodology (RSM). The microstructure of the slurry was characterized via scanning electron microscopy (SEM) and polarized light microscopy (PLM), while low-

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13

Wang, Yi, and Wei Li. "Study on High Temperature Performance of Asphalt Mixture Based on Rutting Test." Applied Mechanics and Materials 744-746 (March 2015): 1316–19. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.1316.

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In order to deeply reveal the high temperature stability of asphalt mixture, rutting test was implemented to evaluate the high temperature stability of asphalt mixture, and the evaluation index is dynamic stability. The effect of asphalt type, degree of compaction, gradation type and nominal maximum aggregate size on rutting test results was studied respectively. The results showed that: modified asphalt can improve the high temperature stability of asphalt mixture effectively; the anti-rutting performance of asphalt mixture reduces gradually with decrease of the degree of compaction; the anti

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14

Gaponov, S. A. "Stability of the Boundary Layer with Internal Heat Release and Gas Injection through a Porous Wall." Fluid Dynamics 57, no. 5 (2022): 587–96. http://dx.doi.org/10.1134/s0015462822050044.

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Abstract The problem of stability of a subsonic boundary layer is solved under the conditions of heat supply inside the boundary layer with injection of a homogeneous gas through a porous plate that partially simulates the problem of stability of a boundary layer with diffuse combustion. Two-dimensional waves are the most growing waves over the entire range of investigated parameters. It is found that in the case of a fixed norm of heat supply the maximum temperature in the boundary layer increases with the Reynolds number, i.e., with increase in the distance from the leading plate edge. This

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15

Zuhdi, Muhammad, and Ahmad Busyairi. "Measurement of Slope Stability on Stone Mines Around Pengsong Hills, West Lombok Area." AMPLITUDO : Journal of Science and Technology Inovation 1, no. 2 (2022): 36–39. http://dx.doi.org/10.56566/amplitudo.v1i2.8.

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The slope stability angle of the surface landslide stability depends on the friction coefficient between the rock particles in the area. Measurement of slope stability is very useful for the safety of miners in mining areas. Measurement of slope stability is based on the friction coefficient. Measurements are made with a friction coefficient measuring instrument that has been designed and tested. Rock samples were taken at 3 rock mines around Mount Pengsong in West Lombok Regency. The measurement of the friction coefficient was carried out at the Physics Laboratory of the University of Mataram

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16

Liu, Xingyue, Kaibo Shi, Lin Tang, and Yiqian Tang. "Further Improvement on Stability Results for Delayed Load Frequency Control System via Novel LKFs and Proportional-Integral Control Strategy." Discrete Dynamics in Nature and Society 2022 (May 9, 2022): 1–17. http://dx.doi.org/10.1155/2022/4798415.

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In this work, novel stability results for load frequency control (LFC) system considering time-varying delays, nonlinearly perturbed load, and time-varying disturbance of system parameters are proposed by using proportional-integral control strategy. Considering the nonlinearly exogenous load disturbance and system parameters disturbance, an improved stability criterion in the form of linear matrix inequalities (LMIs) is derived by novel simple Lyapunov–Krasovskii functionals (LKFs). The delay-dependent matrix in quadratic term, cross terms of variables, and quadratic terms multiplied by 1st,

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17

Lagerev, Alexander V., and Igor A. Lagerev. "The influence of anchoring of remote supports on the stability of mobile transport and technological machines equipped with boom lift manipulators." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 4, no. 2 (2018): 152–69. https://doi.org/10.22281/2413-9920-2018-04-02-152-169.

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<em>The article presents a mathematical model for calculating the characteristics of stability against overturning for mobile transport and technological machines equipped with boom lift manipulators. This model allows us to perform a quantitative assessment of the degree of influence of anchoring of outriggers on the increase of cargo stability of mobile machines during loading and unloading operations. The mathematical model is universal: it allows to estimate efficiency of additional anchoring irrespective of a design of outriggers and placement of anchor devices. On the example of several

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18

Smirnov, Alexey S., and Alexander S. Muravyov. "Optimization of oscillation damping in systems with a non-integer number of degrees of freedom." Vestnik of Saint Petersburg University. Mathematics. Mechanics. Astronomy 9, no. 1 (2022): 164–75. http://dx.doi.org/10.21638/spbu01.2022.116.

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The paper discusses issues related to the choice of the optimal damping for a system with one and a half degrees of freedom - a pendulum with an elastic-movable suspension point in the presence of viscous friction. Maximization of the degree of stability of the system is taken as an optimization criterion characterizing the efficiency of damping oscillations. Two options for installing a damping device are discussed - either in the pendulum joint, or parallel to the elastic element. The analytical solution of the optimization problem is performed in each case, and it is accompanied by a visual

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19

Zhao, Yong Xian, Le Zhao, Yang Yang Zhao, Jian Guo Gao, Zuo Liang Xiao, and Hui Wang. "Study on Relationship between BPA Migration and Thermal-Oxidative Aging Degree of Polycarbonate." Advanced Materials Research 690-693 (May 2013): 1590–93. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.1590.

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The present work was concerned with the study on relationship between the migration level of BPA and thermal-oxidative aging degree of PC used as food and packaging materials. It was indicated that with the increasing of thermal-oxidative aging time, the migration level of BPA increased. The migration level was far beyond the GB/T5009.99-2003 (China). Variation of phenolic hydroxyl absorption intensity in IR spectra and the maximum absorption wavelength red shift of benzene in UV-Vis spectra indicated the same law; Initial weight loss temperature and maximum weight loss rate temperature of PC

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20

Lai, Fei, and Xiaoyu Wang. "Enhancing Autonomous Vehicle Stability through Pre-Emptive Braking Control for Emergency Collision Avoidance." Applied Sciences 13, no. 24 (2023): 13219. http://dx.doi.org/10.3390/app132413219.

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A pre-emptive braking control method is proposed to improve the stability of autonomous vehicles during emergency collision avoidance, aiming to imitate the realistic human driving experience. A linear model predictive control is used to derive the front wheel steering angle to track a predefined fifth-degree polynomial trajectory. Based on a two-degrees-of-freedom (DOF) vehicle dynamics model, the maximum stable vehicle speed during collision avoidance can be determined. If the actual vehicle speed exceeds the maximum stable vehicle speed, braking action will be applied to the vehicle. Furthe

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21

Moraru, Dumitru, and Bartolomeu Izvoreanu. "Synthesis of the Control Algorithm for Third-Order Object Models with Additional Zero and Time Delay." Intellectus, no. 2 (December 2023): 116–22. http://dx.doi.org/10.56329/1810-7087.23.2.12.

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In this paper, the tuning procedure for the standardized PID controller for third-order object models with additional zero and time delay using the maximum stability degree method with iteration is analyzed. Analytical calculation expressions for the tuning parameters of the controller were obtained as nonlinear functions of the argument - the degree of system stability, and linear functions of the known parameters of the object model. By varying the degree of stability, these functions are graphically constructed, after which, for the same argument value, sets of controller tuning parameter v

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22

Moraru, Dumitru. "Tuning method of automatic controllers to object models with second order advance-delay and dead time." Acta et commentationes Ştiinţe Exacte şi ale Naturii 16, no. 2 (2023): 78–88. http://dx.doi.org/10.36120/2587-3644.v16i2.78-88.

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This article explores the application of mathematical models in the design and analysis of automatic control system. By integrating mathematical concepts such as linear algebra, mathematical analysis, the performance and reliability of automatic control systems can be optimized. In the paper, an efficient procedure has been developed for tuning the standardized P, PI, PD, and PID control algorithms to mathematical models of second-order advance-delay with dead time control objects with known parameters, using the maximal stability degree method with iterations. The advantages of the maximum st

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23

Iordache, Simona, Bogdan Tutunaru, Adriana Samide, and Alexandru Popescu. "Electrochemical and Thermal Stability of Nystatin Drug." Revista de Chimie 70, no. 2 (2019): 503–5. http://dx.doi.org/10.37358/rc.19.2.6944.

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The analysis of synthetic / residual drugs is very important due to their systemic toxicity. Simple and rapid electrochemical degradation of nystatin drug was accomplished using constant current density electrolysis on platinum electrode. Electrochemical behavior of nystatin drug was investigated on different metallic electrodes by cyclic voltammetry. In saline solution, distinctive oxidation peak are observed on the lead and copper electrodes. The degree of electrochemical degradation reaches the maximum value of 100 % in 10 minutes on platinum electrodes. Thermal stability of nystatin drug w

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24

Zhang, Fan, Yun Long Mu, Shuang Cheng, Jin Gen Deng, Bao Hua Yu, and Yuan Cao. "Wellbore Stability of Shale below Salt Formation of Faqui Oilfield in Iraq." Applied Mechanics and Materials 641-642 (September 2014): 451–57. http://dx.doi.org/10.4028/www.scientific.net/amm.641-642.451.

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Serious borehole collapse has occurred in shale below salt formation of Fauqi oilfield in Iraq. The Lots of bedding shale cavings returned to ground. The strength of bedding shale cores with different bedding dip angle are tested, which changes along in a high degree with the dip angle and reach the minimum in 50°-60°. The experimental results are regressed by different strength criterion, which demonstrate that McLamore strength criterion is more accurate. The collapse pressure of shale below salt formation is calculated by Mohr-Coulomb criterion and McLamore criterion respectively. The maxim

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25

Zheng, Yun Wu, Li Bin Zhu, Ji You Gu, and Yan Hua Zhang. "Study on the Thermal Stability of MUF Co-Polymerization Resin." Advanced Materials Research 146-147 (October 2010): 1038–42. http://dx.doi.org/10.4028/www.scientific.net/amr.146-147.1038.

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Curing is the key to the bonding, the study indicate that: curing effect on the glue bond strength, formaldehyde emission as well as Productive Efficiency; the better curing system can ensure the Productive Efficiency in basic to decrease the FE. This paper considered the production practice, studied the curing properties of different MUF resin with TGA. The experimental result: Different curing systems, made different curing process. For A curing system, curing rate is the fastest, the degree of curing is best. Cured stability is well. While in the C curing system, Because of their poor degre

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26

Motori, Antonio, Gian Carlo Montanari, Andrea Saccani, and Steve Giannoni. "Effect of recrystallization on the oxidative stability of poly(butylene terephthalate)." Journal of Materials Research 15, no. 1 (2000): 243–47. http://dx.doi.org/10.1557/jmr.2000.0039.

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The oxidative stability of poly(butylene terephthalate) was investigated over the range 175 to 220 °C by isothermal differential calorimetry. It is shown that this property is affected by a fast recrystallization process, which takes place between 200 and 220 °C, with a maximum around 208 °C. In fact, recrystallization produces an increase of the crystallinity degree of the polymer, which enhances its resistance to oxidation, as proven by the longer oxidation times detected.

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Wang, Jian, Hang Li, Pan Dai, and Jinnan Chen. "Development and Characterization of Supercooled Polyethylene Naphthalate." Journal of Research Updates in Polymer Science 12 (July 26, 2023): 71–79. http://dx.doi.org/10.6000/1929-5995.2023.12.07.

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The utilization of undercooled or supercooled polymers presents a promising approach for the creation of single-polymer composites (SPCs), applicable not only to compaction processing but also to extrusion, injection molding, and 3D printing techniques. This study focuses on the development and characterization of supercooled polyethylene naphthalate (PEN) through differential scanning calorimetry (DSC) and rheological measurements. By employing predetermined conditions, a supercooling degree of 50 ˚C for PEN was achieved. The impact of maximum heating temperature, cooling rate, and shear rate

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28

Xiao, Haiping, Guangli Guo, and Lanlan Chen. "Research on Dynamic Evaluation Model of Slope Risk Based on Improved VW-UM." Mathematical Problems in Engineering 2019 (February 6, 2019): 1–13. http://dx.doi.org/10.1155/2019/5813217.

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There are many accidents of slope failure due to rainfall at home and abroad, which have caused heavy casualties and property losses. Stability analysis and evaluation of slope have become a research hotspot. Aiming at the slope stability under different rainfall, this paper takes Yuebao Open-pit Mine slope as an example, has constructed a dynamic variable weight (VW) model of influencing factors on slope stability, and has analyzed the dynamic change and correlation of the slope indexes weights under different monthly maximum rainfall. On this basis, the dynamic evaluation model of slope stab

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29

Wu, Ya Rong, Jing Shun Duanmu, Ji Hui Xu, and Xiao Hong Ren. "Aviation Human Factors Accident Causation Model Based on Structure Entropy." Applied Mechanics and Materials 488-489 (January 2014): 1354–57. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.1354.

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In order to study the traditional accident causation theories and models about human factors in flight accident. A new aviation accident causation model based on the improved HFACS is constructed. Through using system aging, quality and Structure Entropy formula the degree of order of model 1 and model 2 are evaluated, and by selecting aging entropy, maximum timeliness entropy, timeliness, quality entropy and maximum quality entropy the structure of the degree of order is calculated to verify structure in the right to re-bias stability under the conditions. It is shown that the model 2's struc

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30

Kozlov, Valery Vasil'evich. "On stability of equilibria in a pseudo-Riemannian space." Russian Mathematical Surveys 80, no. 1 (2025): 51–74. https://doi.org/10.4213/rm10228e.

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The stability of equilibria is considered for systems whose kinetic energy is a pseudo-Riemannian metric on the configuration space. Equilibria are critical points of the potential energy. For a linear system with two degrees of freedom the stability diagram is plotted and the bifurcations of eigenvalues are indicated. Points of maximum and minimum of the potential energy are unstable equilibria in the pseudo-Euclidean case. The same conclusion holds for nonlinear analytic systems with two degrees of freedom. Conditions for stability are indicated for multidimensional linear systems in a pseud

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Jiang, Ji-Hong, Chang-Ming Zhao, Jun Zhang, Rong-Ming Xu, and Lei Chen. "Biomechanical effects of posterior lumbar interbody fusion with vertical placement of pedicle screws compared to traditional placement." World Journal of Clinical Cases 12, no. 20 (2024): 4108–20. http://dx.doi.org/10.12998/wjcc.v12.i20.4108.

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BACKGROUND The pedicle screw technique is widely employed for vertebral body fixation in the treatment of spinal disorders. However, traditional screw placement methods require the dissection of paraspinal muscles and the insertion of pedicle screws at specific transverse section angles (TSA). Larger TSA angles require more force to pull the muscle tissue, which can increase the risk of surgical trauma and ischemic injury to the lumbar muscles. AIM To study the feasibility of zero-degree TSA vertical pedicle screw technique in the lumbosacral segment. METHODS Finite element models of vertebral

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Tao, Hongliang, Guangli Xu, Jingwen Meng, Ronghe Ma, and Jiaxing Dong. "Stability Assessment of High and Steep Cutting Rock Slopes with the SSPC Method." Advances in Civil Engineering 2021 (April 20, 2021): 1–10. http://dx.doi.org/10.1155/2021/8889526.

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The stability of high rock slopes has become a key engineering geological problem in the construction of important projects in mountainous areas. The original slope stability probability classification (SSPC) system, presented by Hack, has made obvious progress and been widely used in rock slope stability analysis. However, the selection and determination of some evaluation indexes in the original SSPC method are usually subjective, such as intact rock strength and weathering degree. In this study, the SSPC method based on geological data obtained in the prospecting tunnels was presented and a

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Watson, Gary W., and Angela M. Hewitt. "Early Flare Root Development on Nursery Field-Grown Seedling Stock." Forests 11, no. 10 (2020): 1031. http://dx.doi.org/10.3390/f11101031.

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Field production of seedlings used to create nursery stock liners involves transplanting and root pruning that can alter root system architecture. Seedlings of eight species of trees commonly used in urban landscapes were selected based on the configuration of their woody lateral roots; Preferred (maximum gap between roots ≤90 degrees), Acceptable (maximum gap 120–150 degrees), and Inferior (≥180 degree gap—no lateral roots on one side). The lateral root configuration (LRC) of the seedlings was compared to the LRC one year after replanting. The number of lateral or regenerated roots alone was

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Sastre, Jorge, and Javier Ibáñez. "Efficient Evaluation of Matrix Polynomials beyond the Paterson–Stockmeyer Method." Mathematics 9, no. 14 (2021): 1600. http://dx.doi.org/10.3390/math9141600.

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Recently, two general methods for evaluating matrix polynomials requiring one matrix product less than the Paterson–Stockmeyer method were proposed, where the cost of evaluating a matrix polynomial is given asymptotically by the total number of matrix product evaluations. An analysis of the stability of those methods was given and the methods have been applied to Taylor-based implementations for computing the exponential, the cosine and the hyperbolic tangent matrix functions. Moreover, a particular example for the evaluation of the matrix exponential Taylor approximation of degree 15 requirin

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Wang, Lei, Lu Min Wang, Yong Li Liu, et al. "Study of board bending degree on hydrodynamic performances of a single-layer cambered otter-board." E3S Web of Conferences 131 (2019): 01120. http://dx.doi.org/10.1051/e3sconf/201913101120.

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The effect of board bending degree on hydrodynamic performances of a single-layer cambered otter-board was investigated using engineering models in a wind tunnel. Three different bending degree boards were evaluated at a wind speed of 28 m/s. Parameters measured included: drag coefficient Cx, lift coefficient Cy, pitch moment coefficient Cm, center of pressure coefficient Cp , over a range of angle of attack (0° to 70°). These coefficients were used in analyzing the differences in the performance among the three otter-board models. Results showed that the bending of the board(No. 2, No. 3) inc

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36

Binyamen, Lazha Latif, and Zana Qadir Omer. "The Effect of Force Application on the Stability of Mini-Screw in Different Insertion Angles (An in-vitro Study)." Erbil Dental Journal 6, no. 2 (2023): 175–82. http://dx.doi.org/10.15218/edj.2023.19.

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Background and Objective: The stability of the mini-screw is an important factor for the success of orthodontic treatment using an absolute anchorage system. This study aims to evaluate the ideal insertion angle of a mini-implant in relation to force direction and to evaluate the maximum amount of force application at a specific angular configuration. Method: In this experimental study 72 mini-screws were used, 36 of them were used for each shear and tensile force tests, eighteen samples were taken for the bone density D2 (nine for 60 degree angle, and nine for 90 degree angle), and 18 others

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Ezangina, Tatiana Al, and Sergey An Gayvoronskiy. "Robust Control of Weight Compensation of the Sections of Spascraft on the Weightlessness Simulation Bench." Applied Mechanics and Materials 666 (October 2014): 166–70. http://dx.doi.org/10.4028/www.scientific.net/amm.666.166.

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The structure of the robust stabilization system of cable tension for the test bench of weightlessness simulation was developed. The algorithm of a parametric synthesis of the robust PI controller based on the coefficient method and the criterion of maximum degree of stability was suggested. The operability of the synthesized robust system was confirmed by the results of digital simulation.

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Ezangina, Tatiana Al, and Sergey An Gayvoronskiy. "The Synthesis of the Robust Stabilization System of Cable Tension for the Test Bench of Weightlessness Simulation." Advanced Materials Research 1016 (August 2014): 394–99. http://dx.doi.org/10.4028/www.scientific.net/amr.1016.394.

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The structure of the robust stabilization system of cable tension for the test bench of weightlessness simulation was developed. The algorithm of a parametric synthesis of the robust PI–controller based on the coefficient method and the criterion of maximum degree of stability was suggested. The operability of the synthesized robust system was confirmed by the results of digital simulation.

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Chen, Jiazhao, Yuye Tan, Xu Huang, and Jianxin Fu. "Research on a Classification Method of Goaf Stability Based on CMS Measurement and the Cloud Matter–Element Model." Applied Sciences 14, no. 9 (2024): 3774. http://dx.doi.org/10.3390/app14093774.

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The evaluation and classification of goaf stability are fuzzy and random. To address this problem, a new classification method is proposed. A cavity monitoring system is used to detect the goaf, 3DMine and FLAC3D software are used to conduct the 3D visual modeling of the scanning results, and numerical simulation analysis is performed on the goaf. According to the analysis results, the stability classification standard of the goaf is constructed, and the characteristics of each classification are described. The evaluation indicator system of goaf stability is constructed in accordance with sim

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Barić, M., M. Pecina, H. Šarčević, and S. Kereša. "Stability of four Croatian bread winter wheat (Triticum aestivum L.) cultivars for quality traits." Plant, Soil and Environment 50, No. 9 (2011): 402–8. http://dx.doi.org/10.17221/4051-pse.

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Stability of breadmaking quality of four Croatian bread winter wheat cultivars was investigated using rheological traits from the farinogram (dough development time, stability, degree of softening, water absorption, Hankoczy quality number) and the extensogram (extensibility, maximum resistance, ratio of resistance to extensibility, energy) and the indirect traits (protein content, wet gluten content, Zeleny sedimentation volume, Hagberg falling number). Stability was evaluated for four cultivars grown in 12 environments in different parts of Croatia. Four stability parameters, covering a wide

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Аkhmetova, G. R., E. G. Tazeeva, S. G. Yakubova, et al. "Features of Heavy Oil Resins and Their Impact on the Stability of Asphaltenes." Chemistry and Technology of Fuels and Oils 635, no. 1 (2023): 21–24. http://dx.doi.org/10.32935/0023-1169-2023-635-1-21-24.

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Peculiarities of heteroatomic components content and distribution in resins have been studied by the example of heavy oils of Tatarstan and Samara region fields. Peculiarities of structural and group composition of extracted fractions from resinsare shown. Resin fractionation allowed to determine the degree of influence of the heterorganic component content on the asphaltene flocculation. Kinetic studies using UV spectroscopy showed that the maximum efficiency of inhibition of asphaltene deposition for the high-molecular-weight organo-nitrogen bases was detected, which is superior to the origi

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Alamsyah, Ardhi Hidayatullah, Wira Setiawan, et al. "Stability Study of Water Ambulance in East Kalimantan Inland Waterways." WAVE: Jurnal Ilmiah Teknologi Maritim 17, no. 1 (2023): 01–06. http://dx.doi.org/10.55981/wave.2023.186.

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This paper discusses the prediction of ship stability before sailing. This study aims to determine the stability value of the water ambulance in specific operating scenarios. The method used in this study is the B-splines mathematical equation and the optimization method using Maxurf software, which varies ship loading by 100% DWT, 50% DWT, and 25% DWT. The results of the study showed that 100% DWT had a maximum GZ value of 40 degrees and an initial GM of 1.240 meters; 50% DWT conditions had a maximum GZ value of 41.8 degrees and an initial GM of 0.711 meters; and 25% DWT conditions had a maxi

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Zhou, Zhi Jun, Han Liang, and Xiao Dong Wang. "Study on Stability of Rock at Reservoir Banks Slop Based on AHP." Applied Mechanics and Materials 204-208 (October 2012): 2309–17. http://dx.doi.org/10.4028/www.scientific.net/amm.204-208.2309.

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The paper aims to present the authors’ research on application of engineering fuzzy set theory analysis to reservoir ranks rock slop stability evaluation by using analytic hierarchy processing (AHP). Many methods, which used to analysis highway slope stability, are compared in the paper. On the basis of research on the general slope stability evaluation methods, lots of fuzzy factors of stability evaluation for highway slope are researched and fuzzy comparison matrix model is established. Correspondence relationship between mood operator and fuzzy value are determined. Evaluation indexes and g

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Chen, N., C. L. Qin, G. Q. Xie, D. V. Louzguine-Luzgin, and A. Inoue. "Investigation of a ductile and corrosion-resistant Pd79Au1.5Ag3Si16.5 bulk metallic glass." Journal of Materials Research 25, no. 10 (2010): 1943–49. http://dx.doi.org/10.1557/jmr.2010.0246.

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A new Pd79Au1.5Ag3Si16.5 bulk metallic glass was successfully synthesized in a maximum casting thickness range to 3 mm. Upon heating, the single glassy phase decomposed into Pd-rich crystalline phases and a Si-rich amorphous phase due to solute partitioning. In addition to high thermal stability, this bulk glassy alloy also exhibited a high degree of ductility and excellent corrosion resistance, showing potential applications as biomaterials.

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SONG, SHAOXIAN, and YIMIN ZHANG. "STABILITY OF COLLOIDAL ALUMINA DISPERSION IN AQUEOUS ALKYL SULFATE SOLUTIONS." Surface Review and Letters 14, no. 03 (2007): 395–401. http://dx.doi.org/10.1142/s0218625x0700961x.

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Coagulation of colloidal alumina in aqueous solutions in the absence or presence of alkyl sulfates has been studied by means of measurements of electrokinetics, adsorption, and coagulate size in this work. The experimental results showed that the coagulation of colloidal alumina in aqueous alkyl sulfate solutions was much stronger than that in aqueous electrolytic solutions. It closely correlated with particle hydrophobicity rendered by the adsorption of alkyl sulfate anions on alumina/water interfaces, indicating hydrophobic coagulation. Also, it has been found that the hydrocarbon chain leng

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Cheng, Xinyu. "Research on the Statistical Properties and Stability of Complex Interindustrial Networks." Complexity 2024 (February 26, 2024): 1–15. http://dx.doi.org/10.1155/2024/9220756.

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This study consolidates input-output data from 42 sectors across 31 provinces and regions in China into a unified dataset for 42 industrial sectors within eight major economic zones. Leveraging the maximum entropy method, we identify significant interindustrial relationships, subsequently forming a directed, weighted, complex network of these ties. Building upon this intricate network, we analyze its foundational statistical attributes. The stability of the network’s structure is further assessed through simulations of varied network attacks. Our findings demonstrate that the maximum entropy m

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Zhou, Xuefeng, Yisheng Guan, Li Jiang, et al. "Stability of biped robotic walking with frictional constraints." Robotica 31, no. 4 (2012): 573–88. http://dx.doi.org/10.1017/s0263574712000598.

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SUMMARYTipping-over and slipping, which are related to zero moment point (ZMP) and frictional constraint respectively, are the two most common instability forms of biped robotic walking. Conventional criterion of stability is not sufficient in some cases, since it neglects frictional constraint or considers translational friction only. The goal of this paper is to fully address frictional constraints in biped walking and develop corresponding stability criteria. Frictional constraints for biped locomotion are first analyzed and then the method to obtain the closed-form solutions of the frictio

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Deng, Xiaopeng, and Xinghua Xiang. "Fuzzy Comprehensive Evaluation Method for Evaluating Stability of Loess Slopes." Advances in Civil Engineering 2023 (November 23, 2023): 1–15. http://dx.doi.org/10.1155/2023/6692746.

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The stability assessment of loess slopes is of great significance for slope reinforcement and safety assessment. This research studies the main factors affecting the stability of the loess slope through the summary and analyzes the failure cases of the loess slope in Shaanxi Province. The importance of influencing factors was studied through numerical simulation method, sensitivity analysis method, and gray correlation analysis method, and the weight value method was given. On this basis, we have developed the fuzzy comprehensive evaluation model method for assessing the stability of loess slo

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FRYE, MARSHALL, SHANGRADHANVA E. VASISTH, AMALIE ATASSI, DAVID MAZYCK, and JUAN C. NINO. "EFFECT OF DEGREE OF SULFONATION IN NANOCELLULOSE/CHITOSAN COMPOSITE ON ADSORPTION OF CATIONIC DYE AS OPIOID SIMULANT." Cellulose Chemistry and Technology 55, no. 1-2 (2021): 87–99. http://dx.doi.org/10.35812/cellulosechemtechnol.2021.55.09.

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In this study, the effect of nanocellulose sulfonate group content on adsorption of an opioid simulant was tested. The opioid simulant used was Victoria blue R, an amine dye. Nanocellulose filters were fabricated by crosslinking cellulose nanocrystals (CNCs) with chitosan to improve the mechanical stability of freeze-dried CNCs. Thermogravimetric analysis confirmed the filter’s thermal stability and operating temperatures. Conductometric titration, Fourier transform infrared spectroscopy, and scanning electron microscopy techniques were used to characterize the degree of nanocellulose function

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KIM, MI-YOUNG. "DISCONTINUOUS GALERKIN METHODS FOR THE LOTKA–MCKENDRICK EQUATION WITH FINITE LIFE-SPAN." Mathematical Models and Methods in Applied Sciences 16, no. 02 (2006): 161–76. http://dx.doi.org/10.1142/s0218202506001108.

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We consider a model of population dynamics whose mortality function is unbounded and the solution is not regular near the maximum age. A continuous-time discontinuous Galerkin method to approximate the solution is described and analyzed. Our results show that the scheme is convergent, in L∞(L2) norm, at the rate of r + 1/2 away from the maximum age and that it is convergent at the rate of l - 1/(2q) + α/2 in L2(L2) norm, near the maximum age, if u ∈ L2(Wl,2q), where q ≥ 1, 1/2 ≤ l ≤ r + 1, r is the degree of the polynomial of the approximation space, and α is the growth rate of the mortality f

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